diff --git a/src/activities/Elsa.Activities.RabbitMq/Activities/RabbitMqMessageReceived/RabbitMqMessageReceived.cs b/src/activities/Elsa.Activities.RabbitMq/Activities/RabbitMqMessageReceived/RabbitMqMessageReceived.cs
index 5ec1a80ddb..94195b237c 100644
--- a/src/activities/Elsa.Activities.RabbitMq/Activities/RabbitMqMessageReceived/RabbitMqMessageReceived.cs
+++ b/src/activities/Elsa.Activities.RabbitMq/Activities/RabbitMqMessageReceived/RabbitMqMessageReceived.cs
@@ -36,7 +36,8 @@ public class RabbitMqMessageReceived : Activity
             Order = 3,
             UIHint = ActivityInputUIHints.Dictionary,
             DefaultSyntax = SyntaxNames.Json,
-            SupportedSyntaxes = new[] { SyntaxNames.Json })]
+            SupportedSyntaxes = new[] { SyntaxNames.Json,SyntaxNames.JavaScript })]
+        
         public Dictionary<string, string> Headers { get; set; } = new Dictionary<string, string>();
 
         [ActivityInput(
@@ -70,4 +71,4 @@ private IActivityExecutionResult ExecuteInternalAsync(ActivityExecutionContext c
             return Done();
         }
     }
-}
\ No newline at end of file
+}
diff --git a/src/activities/Elsa.Activities.RabbitMq/Activities/SendRabbitMqMessage/SendRabbitMqMessage.cs b/src/activities/Elsa.Activities.RabbitMq/Activities/SendRabbitMqMessage/SendRabbitMqMessage.cs
index c2a6a9babf..82995627d9 100644
--- a/src/activities/Elsa.Activities.RabbitMq/Activities/SendRabbitMqMessage/SendRabbitMqMessage.cs
+++ b/src/activities/Elsa.Activities.RabbitMq/Activities/SendRabbitMqMessage/SendRabbitMqMessage.cs
@@ -44,7 +44,7 @@ public SendRabbitMqMessage(IMessageSenderClientFactory messageSenderClientFactor
             Order = 3,
             UIHint = ActivityInputUIHints.Dictionary,
             DefaultSyntax = SyntaxNames.Json,
-            SupportedSyntaxes = new[] { SyntaxNames.Json })]
+            SupportedSyntaxes = new[] { SyntaxNames.Json, SyntaxNames.JavaScript  })]
         public Dictionary<string, string> Headers { get; set; } = new Dictionary<string, string>();
 
         [ActivityInput(